Raft or boat davits.



I. JOHANSEN.

RAFT 0R BOAT DAVITS.

APPLICATION FILED JULY 5, 1912.

Patented June 16,191;

2 SHEETS-$111531 1.

i 26 Iggzvaldfikam'ren a? rmy? COLUMBIA PLANOGRAPN CO4. WASHINGTON, D. c.

I. JOHANSENr RAFT 0R BOAT DAVITS.

APPLIOAIION FILED JULY 5, 1912.

1,100,571, Patented June 16,1914,

2 SHEETS-SHEET 2.

IIA PMNGGHADH 00.. WASHINGTON. D. c.

UNITED STATES PATENT OFFICE.

INGWALD JOHANSEN, OF NEVT YORK, N. Y., ASSIGNOR 0F ONE-HALF TO'AUGUST FORSGREEN, OF EGELANTD, NOR-TH DAKOTA.

RAFT OR BOAT DAVITS.

Specification of Letters Patent.

Patented J une 16, 1914.

Application fi1ed July 5, 1912. Serial No. 707,890.

To all whom it may concern Be it known that I, INGWALD JoHANsEN, a subject of the King of Norway, residing at Brooklyn, in the county of Kings and State of New York, have invented new and useful Improvements in Raft or Boat Davits, of which the following is a specification.

The general object of the invention is to admit of the easy and expeditious launching or projecting of a raft or life boat fronrits cradle or other nesting place to a positlon beyond the ships side. And to this end the invention consists in an inclined track arranged to be projected beyond the side of the ship and boat carrying tackle adapted to travel on said track.

Other objects will appear and be better understood from that embodiment of the invention of which the following is a specification, reference being had to the accompanying drawings forming part hereof and in which Figure 1 is a side elevation showing by full lines the position which the boat occupies normally on the deck of the vessel and by dotted lines the position of the boat when moving to a position beyond the side of the vessel. Fig. 2 is a detail front elevation of one end of a boat fall constructed in accordance with my invention, and showing by dotted lines the position which the track extension occupies when not in use. Fig. 3 is a view similar to Fi 2 but showing the position the boat occupies preparatory to lowering the same from the davit heads into the water. Fig. 1 is a detail partly in section and elevation showing one of the track rails and a carrier. Fig. 5 is a detail side eleva tion of the windlass.

The davit indicated generally by a in Figs. 1 to 3 inclusive, is a companion to a similarly constructed davit from which it is spaced for such distance as will admit of the boat or raft Z) occupying, when not in use, and upon the deck of the vessel, a position between the davits. Each davit consists of an inboard upright 5 slightly inclined from the vertical as shown in Fig. 2, and an outboard upright 6 of less height than the upright 5 and like the latter being inclined from the vertical or inclining in a fore-andaft direction. A track rail 7 is suitably connected to the inner faces of each of the uprights 5 and 6 and is connected to the upper ends of the said uprights so that it will incline downwardly and outwardly as shown in the drawings.

Truss bars, one of which is shown in Figs. 1 to 3 inclusive, and designated by 8, are arranged so as to brace the outboard uprights 6. Inclined track extensions, one of which is shown in Figs. 1 to 3 inclusive, and indicated by 9, are triangular or of such other shape as will admit of their forming co-extensions of the track rails 7 when swung out- Wardly and at right angles to the side of the ship as shown in Fig. 1. The bearings 10 1.0 carried by the outboard uprights 6 support the track extensions 9 and admit of their being turned from the position shown by dotted lines in Fig. 2 to the position shown by full lines in the same figure and Figs 1 and 3.

The carriers, one of which is shown in Figs. 1 to a inclusive and indicated by 11, are provided for the track rails 7-7. The sheaves 12 of these carriers travel upon the tread surfaces of the track rails 7-7 and track extensions 9 and are mounted between the sides 13 and 1 1 of the carriers. The in ward projections 1515 on the sides of each carrier are for preventing lateral or vertical displacement of the sheave on the track rail. The sides 13 of the carriers are arranged over the inner sides of the track rails and extend below the said track rails and carry blocks, one of which is shown in Figs. 1 to 3 and indicated by 16. The blocks 16 form part of the ordinary hoisting and lowering tackle and are connected by the ropes 17 to blocks 18, one of which is shown in Figs. 1 to 3, and which carry the clews 19 which are connected to suitable fastening means such as an eye bolt 20 in the bottom of each block 18. The ropes 17 also connect with windlasses, one of which is shown in Figs. 1 and 3 and indicated by 21.

When the parts are arranged as shown in Fig. 1, the lower blocks 18 are pulled close to the deck of the life boat by lanyards, one of which is shown in Fig. 1 and indicated by 22, which pass through eye bolts 23 in the deck of the life boat and which are fastened on to cleats, one of which is shown in Fig. 1, and indicated by 24. When the parts are so positioned the track extensions 9 occupy foreand-aft positions as shown in Fig. 2. l/Vhen it becomes necessary to lower the boat, the track extensions 9 are moved outwardly by suitable tackle 25 as shown in Fig. 2

and into the position shown in Figs. 1 and 3. The inboard side of the boat is then tilted upwardly and moved upon the rolls, one of which is shown in Figs. 1 to 3 and indicated by 26. The dog 27 of each Windlass is then lifted so as to admit of the paying out of the line as the boat slides outwardly to the position shown by dotted lines in Fig. 1. As the boat moves outwardly, the sheaves of the carriers 11 will roll upon the track rails 7 and 9 and until the said sheaves abut the upwardly directed stops 28 at the outer ends of the track extensions 9. The operators at the windlasses then move the dogs into e11- gageinent with the ratchets, one of which is shown in Fig. 5 and indicated by 29, after which the lanyards 22 are disconnected from the cleats so as to admit of the unfolding of the clews 19 as shown in Fig. 3. The boat is now ready for lowering and this lowering is effected by releasing the dogs 27 from the ratchet wheels 29. It will, of course, be understood that the operators at the windlasses will have hold of the handles 30 thereof so as to prevent the too sudden descent of the boat.

From the foregoing it will have been observed that the device is comparatively simple in structure and consequently may be produced at a minimum of cost. In addition to these important features it will be seen that in point of time required for launching the boat the device has a great advantage over many other devices in its class.

lVhat I claim as new is:-

An apparatus as described comprising a platform adapted to support a raft or the like, a track supported above the platform and inclined downwardly from the intermediate portion thereof, toward the edge thereof, a second track pivotally mounted at the edge of the platform and having the axis of its pivot at the lowermost end of the first mentioned track and below the same and in a vertical plane disposed longitudinally in alinement with the first mentioned track, the axis of the pivot 0f the second mentioned track being inclined outwardly from its lower to its upper end with relation to the edge of the platform, the second mentioned track being so disposed upon its pivot as to assume a position in longitudinal alinement with the first mentioned track when the said second mentioned track is swung outwardly beyond the edge of the platform, a carrier arranged to move along the tracks and means for connecting the raft to the car rier.

In testimony whereof I afiix my signature in presence of two witnesses.

INGVALD J OHANSEN. lVitnesses C. James CRONIN, G120. A. BYRNE.

Copies of this patent ma; be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

